docs: def get_file(file_id: str, download):
      """
      Get a specific file from GridFS.
  
      Returns a binary stream response or HTTP 404 if not found.
      """
      data = current_app.config["data"]  # type: DataStorage
      dao = data.get_files_dao()
      file_fp, filename, upload_date = dao.get(file_id)
  
      if download:
          mime = mimetypes.guess_type(filename)[0]
          if mime is None:
              # unknown type
              mime = "binary/octet-stream"
  
          basename = os.path.basename(filename)
          return send_file(file_fp, mimetype=mime, attachment_filename=basename, as_attachment=True)
  
      else:
          rawdata = file_fp.read()
          try:
              text = rawdata.decode('utf-8')
          except UnicodeDecodeError:
              # not decodable as utf-8
              text = _get_binary_info(rawdata)
          html = render_template("api/file_view.html", content=text)
          file_fp.close()
          return Response(html)